But he was turned away minutes after his plane touched down last Monday.

McLaggan fled from the car seconds before Carroll was gunned down in ­January 2010.

He was with the drug baron at a secret ­summit with another dealer at an Asda car park in ­Glasgow’s Robroyston.

One of the guns used to kill Kevin Carroll found in plastic bag behind a library in Coatbridge (Image: Crown)

Car trader McLaggan was due to attend the North American­ ­Federations of Celtic Supporters Clubs’ annual convention. But friends warned he risked being refused entry when he announced the holiday on Facebook.

One wrote: “You’re ­getting patted on the back and sent home as soon as you land.”

The scene at an Asda car park in Glasgow after the murder (Image: PA)

McLaggan, of Glasgow’s Balornock, was sent back to the UK on the next ­available flight.

Last night, McLaggan was ­unavailable for comment. But his dad Stephen said: “He’s said, ‘F*** the Yanks’.”

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